scholarly journals Exhaustive reanalysis of barcode sequences from public repositories highlights ongoing misidentifications and impacts taxa diversity and distribution: a case study of the Sea Lettuce.

Author(s):  
Antoine Fort ◽  
Marcus McHale ◽  
Kevin Cascella ◽  
Philippe Potin ◽  
Marie-Mathilde Perrineau ◽  
...  

Sea Lettuce (Ulva spp.; Ulvophyceae, Ulvales, Ulvaceae) is an important ecological and economical entity, with a worldwide distribution and is a well-known source of near-shore blooms blighting many coastlines. Species of Ulva are frequently misidentified in public repositories, including herbaria and gene banks, making species identification based on traditional barcoding hazardous. We investigated the species distribution of 295 individual distromatic foliose strains from the North East Atlantic by traditional barcoding or next generation sequencing. We found seven distinct species, and compared our results with all worldwide Ulva spp sequences present in the NCBI database for the three barcodes rbcL, tufA and the ITS1. Our results demonstrate a large degree of species misidentification in the NCBI database. We estimate that 21% of the entries pertaining to foliose species are misannotated. In the extreme case of U. lactuca, 65% of the entries are erroneously labelled specimens of another Ulva species, typically U. fenestrata. In addition, 30% of U. rigida entries are misannotated, U. rigida being relatively rare and often misannotated U. laetevirens. Furthermore, U. armoricana and U. scandinavica present as being synonymous to U. laetevirens. An analysis of the global distribution of registered samples from foliose species also indicates possible geographical isolation for some species, and the absence of U. lactuca from Northern Europe. Altogether, exhaustive taxonomic clarification by aggregation of a library of barcode sequences highlights misannotations, and delivers an improved representation of Ulva species diversity and distribution. This approach could be easily adapted to other taxa.

Author(s):  
Roxana Mironescu ◽  
Andreea Feraru ◽  
Ovidiu Turcu

The intellectual capital in its dynamic approach focusses on the development of the entropic model, which expresses the dynamic transformation of the theoretical intellectual capital in a concrete and useful intellectual capital. The aim of the present paper is to perform a detailed analysis of the intellectual capital inside the SMES of the North-Est region of the country. It also speaks about the influence of the main integrators of the intellectual capital, divided into three elements: the cognitive, the emotional and the spiritual capital, about how they are acting as a field of forces upon the basic components of the intellectual capital, such as knowledge, intelligence and values and how they determine the generation and development of the intellectual capital in the eastern analyzed SMEs. Both jobs and teams inside the analyzed SMEs are stimulating the development of the intellectual skills, which reduces the need for involving the external experts, by appealing only those specialists who could transform the tacit knowledge into explicit knowledge. The organizational communication provides the necessary information and contributes to the establishment of a fair climate and of the effective relationships between managers and employees, between work mates, and also with the people outside the organization.


2021 ◽  
pp. 355-451
Author(s):  
René Provost

Chapter 4 analyses the possible legal recognition of insurgent justice by other actors, using the judicial practice of three independent Kurdish non-state armed groups in the Middle East as a case study. The Partiya Karkerên Kurdistan (PKK, Kurdistan Workers’ Party) has been engaged in a bitter armed struggle with Turkey since 1984, with rear bases in northern Iraq and Syria. The Partiya Yekîtiya Demokrat (PYD, Democratic Union Party) is a Kurdish insurgent group that joined the anti-Assad uprising of 2011 and now controls parts of the north-east part of Syria, in a precarious coexistence with the Syrian government. Finally, the Kurdish Regional Government (KRG) has operated independently since 1991 and remain in a military standoff with the central Iraqi government. All three Kurdish groups operate courts at trial and appeal levels, for civil and criminal matters. The chapter considers the possible application of the principle of complementarity under the Rome Statute in relation to a prosecution before the courts of a non-state armed groups. Likewise, the right or duty of third states under international law to give recognition to the operation of insurgent courts is examined. More radically perhaps, there is a possibility that even the territorial state might in some cases give legal effect to rebel court decisions. Finally, the Kurdish courts offer examples in which one non-state armed group is confronted with the need to determine the validity of the decisions of courts of other armed insurgents.


Author(s):  
Pauline Leonard ◽  
Rachel J. Wilde

This chapter explores the rise of the concept of employability and how it has influenced policy and practical interventions to address unemployment. It explores how the concept has been understood as a threshold for labour market readiness or as a process of continual skills development necessary in a flexible labour market. It argues that employability is frequently utilised in neoliberalising forms of governmentality, shifting responsibility of gaining work onto the individual, rather than considering the various external and structural factors that affect employment prospects. A case study of an employability programme in the North East explores the practices through which the discourse of employability acts upon individuals.


2013 ◽  
Vol 95 (7) ◽  
pp. 1461-1474 ◽  
Author(s):  
R.W.M. van Soest ◽  
N.J. de Voogd

A comparison is made of sponge diversity and abundance in nine cold-water coral reef locations situated in four regions of the north-east Atlantic, Rockall Bank (two reef locations, both deep, oceanic), Porcupine Bank (two locations, both deep, oceanic), Mingulay (two reef locations, both shallow, near-shore), Skagerrak (three reef locations, all shallow, near-shore). Literature data from two reefs were used to supplement our own data from seven reef locations. Geographical distance between the regions may be summarized as Rockall Bank < Porcupine << Mingulay <<< Skagerrak. The first three regions are all situated west of the British Isles, and prevailing current patterns and bottom conditions would make direct larval transport between all three a distinct possibility. The fourth region, Skagerrak, is situated away from the Atlantic regions, with larval contact hampered by long distances over predominantly shallow sedimented sea bottoms. Accordingly, we expected the largest taxon turnover to be between the three Atlantic regions and the Skagerrak localities. However, cluster analysis and multidimensional scaling clearly show, that shelf reefs at Mingulay were faunistically closer to the geographically- distant shelf reefs at Skagerrak than to the geographically closer bathyal reefs of the Porcupine–Rockall area. Further research is necessary to determine whether depth is a proxy for other abiotic factors such as oceanic circulation or trophic conditions.


2008 ◽  
Vol 31 (-1) ◽  
pp. 45-52 ◽  
Author(s):  
Manoj Jaiswal ◽  
Pradeep Srivastava ◽  
Jayant Tripathi ◽  
Rafique Islam

Feasibility of the Sar Technique on Quartz Sand of Terraces of NW Himalaya: A Case Study from DevprayagOptically Stimulated Luminescence (OSL) dating technique based on the Single Aliquot Regenerative dose (SAR) protocol is being used increasingly as a means of establishing sediment burial age in the late Quaternary studies. Thermal transfer, low and changing luminescence sensitivity of quartz grains of young sedimentary belts of the New Zealand Alps and the north-east Himalaya poses problems in using SAR protocol. Records of active tectonics and signatures of palaeo-climate are preserved in the Quaternary - Holocene terrace sediments. Therefore, to unfold the history of successive tectonic and palaeo-climate events, robust chronological technique is needed. Palaeoflood deposits in NW Lesser Himalayan region receive quartz from the weathering of various rock types such as quartzite and phyllite in the Alaknanda Basin. A series of tests e.g. dose recovery, preheat plateau, thermal recuperation and change in sensitivity, were performed to check the suitability of quartz grains collected from the terrace sediment of Devprayag of the NW Himalaya, for OSL studies. Inferences were drawn regarding the source of the quartz grains on the basis of the geochemistry and luminescence intensity of the terrace sediment. The study shows that though quartz from the North West Himalaya are low in luminescence intensity but the reproducibility of De value makes the quartz sand suitable for SAR dating technique. Relation between luminescence intensity with CIA values help to predict the provenance of quartz sand. Tests show that the quartz from NW Himalaya is suitable for SAR protocol in OSL.


Author(s):  
STAVROULA TSOUKALI ◽  
MARIANNA GIANNOULAKI ◽  
APOSTOLOS SIAPATIS ◽  
EUDOXIA SCHISMENOU ◽  
STYLIANOS SOMARAKIS

Multispecies ichthyoplankton associations are believed to be adaptive and their objective definition can be useful in designating species with similar or contrasting spawning strategies. In this case study, a suite of indicators, recently developed to characterize the spatial patterns of animal populations, are applied on egg abundance data of summer-spawning European anchovy (Engraulis encrasicolus), round sardinella (Sardinella aurita) and chub mackerel (Scomber colias), in an effort to identify common or contrasting spawning patterns in the North-East Aegean Sea (NEA) and their relation to the major oceanographic features of the area. A considerable increase in abundance and area of presence was observed between the early (May) and advanced (July) phase of the 2010 spawning period. The definition of major spatial patches revealed a persistent multispecies spawning location associated with the outflow of Black Sea water (BSW). A second major patch was defined for anchovy and chub mackerel in July, clearly associated with the Samothraki gyre (SG). In contrast, round sardinella spawned in coastal waters outside the SG. Surprisingly, in May 2010, the spawning intensity of anchovy was very low in the SG which was attributed to unfavorable conditions caused by the bloom of mucilage-producing phytoplankton cells. The levels of aggregation and occupation of space seemed to be adequately described by the indices of Positive, Equivalent and Spreading Area. Conclusively, many of the spatial indicators applied in this study have the potential to become important tools for studying egg distributions and the changing priorities of adult fish in selecting spawning sites.


Sign in / Sign up

Export Citation Format

Share Document